1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
media / gpu / v4l2 / v4l2_video_decoder_delegate_vp9.cc [blame]
// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/gpu/v4l2/v4l2_video_decoder_delegate_vp9.h"
#include <linux/v4l2-controls.h>
#include "base/logging.h"
#include "base/numerics/safe_math.h"
#include "media/gpu/macros.h"
#include "media/gpu/v4l2/v4l2_decode_surface.h"
#include "media/gpu/v4l2/v4l2_decode_surface_handler.h"
#include "media/parsers/vp9_parser.h"
namespace media {
using DecodeStatus = VP9Decoder::VP9Accelerator::Status;
class V4L2VP9Picture : public VP9Picture {
public:
explicit V4L2VP9Picture(scoped_refptr<V4L2DecodeSurface> dec_surface)
: dec_surface_(std::move(dec_surface)) {}
V4L2VP9Picture(const V4L2VP9Picture&) = delete;
V4L2VP9Picture& operator=(const V4L2VP9Picture&) = delete;
V4L2VP9Picture* AsV4L2VP9Picture() override { return this; }
scoped_refptr<V4L2DecodeSurface> dec_surface() { return dec_surface_; }
private:
~V4L2VP9Picture() override = default;
scoped_refptr<VP9Picture> CreateDuplicate() override {
return new V4L2VP9Picture(dec_surface_);
}
scoped_refptr<V4L2DecodeSurface> dec_surface_;
};
namespace {
scoped_refptr<V4L2DecodeSurface> VP9PictureToV4L2DecodeSurface(
VP9Picture* pic) {
V4L2VP9Picture* v4l2_pic = pic->AsV4L2VP9Picture();
CHECK(v4l2_pic);
return v4l2_pic->dec_surface();
}
void FillV4L2VP9LoopFilterParams(const Vp9LoopFilterParams& vp9_lf_params,
struct v4l2_vp9_loop_filter* v4l2_lf) {
#define SET_FLAG_IF(cond, flag) \
v4l2_lf->flags |= ((vp9_lf_params.cond) ? (flag) : 0)
SET_FLAG_IF(delta_enabled, V4L2_VP9_LOOP_FILTER_FLAG_DELTA_ENABLED);
SET_FLAG_IF(delta_update, V4L2_VP9_LOOP_FILTER_FLAG_DELTA_UPDATE);
#undef SET_FLAG_IF
v4l2_lf->level = vp9_lf_params.level;
v4l2_lf->sharpness = vp9_lf_params.sharpness;
SafeArrayMemcpy(v4l2_lf->ref_deltas, vp9_lf_params.ref_deltas);
SafeArrayMemcpy(v4l2_lf->mode_deltas, vp9_lf_params.mode_deltas);
}
void FillV4L2VP9QuantizationParams(
const Vp9QuantizationParams& vp9_quant_params,
struct v4l2_vp9_quantization* v4l2_quant) {
v4l2_quant->base_q_idx = vp9_quant_params.base_q_idx;
v4l2_quant->delta_q_y_dc = vp9_quant_params.delta_q_y_dc;
v4l2_quant->delta_q_uv_dc = vp9_quant_params.delta_q_uv_dc;
v4l2_quant->delta_q_uv_ac = vp9_quant_params.delta_q_uv_ac;
}
void FillV4L2VP9SegmentationParams(const Vp9SegmentationParams& vp9_seg_params,
struct v4l2_vp9_segmentation* v4l2_seg) {
#define SET_FLAG_IF(cond, flag) \
v4l2_seg->flags |= ((vp9_seg_params.cond) ? (flag) : 0)
SET_FLAG_IF(enabled, V4L2_VP9_SEGMENTATION_FLAG_ENABLED);
SET_FLAG_IF(update_map, V4L2_VP9_SEGMENTATION_FLAG_UPDATE_MAP);
SET_FLAG_IF(temporal_update, V4L2_VP9_SEGMENTATION_FLAG_TEMPORAL_UPDATE);
SET_FLAG_IF(update_data, V4L2_VP9_SEGMENTATION_FLAG_UPDATE_DATA);
SET_FLAG_IF(abs_or_delta_update,
V4L2_VP9_SEGMENTATION_FLAG_ABS_OR_DELTA_UPDATE);
#undef SET_FLAG_IF
SafeArrayMemcpy(v4l2_seg->tree_probs, vp9_seg_params.tree_probs);
SafeArrayMemcpy(v4l2_seg->pred_probs, vp9_seg_params.pred_probs);
constexpr size_t kV4L2VP9SegmentationFeaturesLength =
std::extent<decltype(v4l2_seg->feature_enabled), 0>::value;
static_assert(static_cast<size_t>(Vp9SegmentationParams::SEG_LVL_MAX) ==
static_cast<size_t>(V4L2_VP9_SEG_LVL_MAX),
"mismatch in number of segmentation features");
for (size_t j = 0; j < kV4L2VP9SegmentationFeaturesLength; j++) {
for (size_t i = 0; i < V4L2_VP9_SEG_LVL_MAX; i++) {
if (vp9_seg_params.feature_enabled[j][i])
v4l2_seg->feature_enabled[j] |= V4L2_VP9_SEGMENT_FEATURE_ENABLED(i);
}
}
SafeArrayMemcpy(v4l2_seg->feature_data, vp9_seg_params.feature_data);
}
void FillV4L2VP9MvProbsParams(const Vp9FrameContext& vp9_ctx,
struct v4l2_vp9_mv_probs* v4l2_mv_probs) {
SafeArrayMemcpy(v4l2_mv_probs->joint, vp9_ctx.mv_joint_probs);
SafeArrayMemcpy(v4l2_mv_probs->sign, vp9_ctx.mv_sign_prob);
SafeArrayMemcpy(v4l2_mv_probs->classes, vp9_ctx.mv_class_probs);
SafeArrayMemcpy(v4l2_mv_probs->class0_bit, vp9_ctx.mv_class0_bit_prob);
SafeArrayMemcpy(v4l2_mv_probs->bits, vp9_ctx.mv_bits_prob);
SafeArrayMemcpy(v4l2_mv_probs->class0_fr, vp9_ctx.mv_class0_fr_probs);
SafeArrayMemcpy(v4l2_mv_probs->fr, vp9_ctx.mv_fr_probs);
SafeArrayMemcpy(v4l2_mv_probs->class0_hp, vp9_ctx.mv_class0_hp_prob);
SafeArrayMemcpy(v4l2_mv_probs->hp, vp9_ctx.mv_hp_prob);
}
void FillV4L2VP9ProbsParams(const Vp9FrameContext& vp9_ctx,
struct v4l2_ctrl_vp9_compressed_hdr* v4l2_probs) {
SafeArrayMemcpy(v4l2_probs->tx8, vp9_ctx.tx_probs_8x8);
SafeArrayMemcpy(v4l2_probs->tx16, vp9_ctx.tx_probs_16x16);
SafeArrayMemcpy(v4l2_probs->tx32, vp9_ctx.tx_probs_32x32);
SafeArrayMemcpy(v4l2_probs->coef, vp9_ctx.coef_probs);
SafeArrayMemcpy(v4l2_probs->skip, vp9_ctx.skip_prob);
SafeArrayMemcpy(v4l2_probs->inter_mode, vp9_ctx.inter_mode_probs);
SafeArrayMemcpy(v4l2_probs->interp_filter, vp9_ctx.interp_filter_probs);
SafeArrayMemcpy(v4l2_probs->is_inter, vp9_ctx.is_inter_prob);
SafeArrayMemcpy(v4l2_probs->comp_mode, vp9_ctx.comp_mode_prob);
SafeArrayMemcpy(v4l2_probs->single_ref, vp9_ctx.single_ref_prob);
SafeArrayMemcpy(v4l2_probs->comp_ref, vp9_ctx.comp_ref_prob);
SafeArrayMemcpy(v4l2_probs->y_mode, vp9_ctx.y_mode_probs);
SafeArrayMemcpy(v4l2_probs->uv_mode, vp9_ctx.uv_mode_probs);
SafeArrayMemcpy(v4l2_probs->partition, vp9_ctx.partition_probs);
FillV4L2VP9MvProbsParams(vp9_ctx, &v4l2_probs->mv);
}
} // namespace
V4L2VideoDecoderDelegateVP9::V4L2VideoDecoderDelegateVP9(
V4L2DecodeSurfaceHandler* surface_handler,
V4L2Device* device)
: surface_handler_(surface_handler),
device_(device),
supports_compressed_header_(
device->IsCtrlExposed(V4L2_CID_STATELESS_VP9_COMPRESSED_HDR)) {
VLOGF(1);
DCHECK(surface_handler_);
DCHECK(device_);
// This control, originally landed in v5.17, is pretty much a marker that the
// driver supports the stable API.
const bool supports_stable_api =
device_->IsCtrlExposed(V4L2_CID_STATELESS_VP9_FRAME);
DCHECK(supports_stable_api);
}
V4L2VideoDecoderDelegateVP9::~V4L2VideoDecoderDelegateVP9() = default;
scoped_refptr<VP9Picture> V4L2VideoDecoderDelegateVP9::CreateVP9Picture() {
scoped_refptr<V4L2DecodeSurface> dec_surface =
surface_handler_->CreateSurface();
if (!dec_surface)
return nullptr;
return new V4L2VP9Picture(std::move(dec_surface));
}
scoped_refptr<VP9Picture> V4L2VideoDecoderDelegateVP9::CreateVP9PictureSecure(
uint64_t secure_handle) {
scoped_refptr<V4L2DecodeSurface> dec_surface =
surface_handler_->CreateSecureSurface(secure_handle);
if (!dec_surface) {
return nullptr;
}
return new V4L2VP9Picture(std::move(dec_surface));
}
DecodeStatus V4L2VideoDecoderDelegateVP9::SubmitDecode(
scoped_refptr<VP9Picture> pic,
const Vp9SegmentationParams& segm_params,
const Vp9LoopFilterParams& lf_params,
const Vp9ReferenceFrameVector& ref_frames) {
const Vp9FrameHeader* frame_hdr = pic->frame_hdr.get();
DCHECK(frame_hdr);
struct v4l2_ctrl_vp9_frame v4l2_frame_params;
memset(&v4l2_frame_params, 0, sizeof(v4l2_frame_params));
#define SET_FLAG_IF(cond, flag) \
v4l2_frame_params.flags |= ((frame_hdr->cond) ? (flag) : 0)
SET_FLAG_IF(frame_type == Vp9FrameHeader::KEYFRAME,
V4L2_VP9_FRAME_FLAG_KEY_FRAME);
SET_FLAG_IF(show_frame, V4L2_VP9_FRAME_FLAG_SHOW_FRAME);
SET_FLAG_IF(error_resilient_mode, V4L2_VP9_FRAME_FLAG_ERROR_RESILIENT);
SET_FLAG_IF(intra_only, V4L2_VP9_FRAME_FLAG_INTRA_ONLY);
SET_FLAG_IF(allow_high_precision_mv, V4L2_VP9_FRAME_FLAG_ALLOW_HIGH_PREC_MV);
SET_FLAG_IF(refresh_frame_context, V4L2_VP9_FRAME_FLAG_REFRESH_FRAME_CTX);
SET_FLAG_IF(frame_parallel_decoding_mode,
V4L2_VP9_FRAME_FLAG_PARALLEL_DEC_MODE);
SET_FLAG_IF(subsampling_x, V4L2_VP9_FRAME_FLAG_X_SUBSAMPLING);
SET_FLAG_IF(subsampling_y, V4L2_VP9_FRAME_FLAG_Y_SUBSAMPLING);
SET_FLAG_IF(color_range, V4L2_VP9_FRAME_FLAG_COLOR_RANGE_FULL_SWING);
#undef SET_FLAG_IF
v4l2_frame_params.compressed_header_size = frame_hdr->header_size_in_bytes;
v4l2_frame_params.uncompressed_header_size =
frame_hdr->uncompressed_header_size;
v4l2_frame_params.profile = frame_hdr->profile;
// As per the VP9 specification:
switch (frame_hdr->reset_frame_context) {
// "0 or 1 implies don’t reset."
case 0:
case 1:
v4l2_frame_params.reset_frame_context = V4L2_VP9_RESET_FRAME_CTX_NONE;
break;
// "2 resets just the context specified in the frame header."
case 2:
v4l2_frame_params.reset_frame_context = V4L2_VP9_RESET_FRAME_CTX_SPEC;
break;
// "3 reset all contexts."
case 3:
v4l2_frame_params.reset_frame_context = V4L2_VP9_RESET_FRAME_CTX_ALL;
break;
default:
VLOGF(1) << "Invalid reset frame context value!";
v4l2_frame_params.reset_frame_context = V4L2_VP9_RESET_FRAME_CTX_NONE;
break;
}
v4l2_frame_params.frame_context_idx =
frame_hdr->frame_context_idx_to_save_probs;
v4l2_frame_params.bit_depth = frame_hdr->bit_depth;
v4l2_frame_params.interpolation_filter = frame_hdr->interpolation_filter;
v4l2_frame_params.tile_cols_log2 = frame_hdr->tile_cols_log2;
v4l2_frame_params.tile_rows_log2 = frame_hdr->tile_rows_log2;
if (supports_compressed_header_) {
v4l2_frame_params.reference_mode =
frame_hdr->compressed_header.reference_mode;
}
for (size_t i = 0; i < Vp9RefType::VP9_FRAME_MAX - VP9_FRAME_LAST; i++) {
v4l2_frame_params.ref_frame_sign_bias |=
(frame_hdr->ref_frame_sign_bias[i + VP9_FRAME_LAST] ? (1 << i) : 0);
}
v4l2_frame_params.frame_width_minus_1 = frame_hdr->frame_width - 1;
v4l2_frame_params.frame_height_minus_1 = frame_hdr->frame_height - 1;
v4l2_frame_params.render_width_minus_1 = frame_hdr->render_width - 1;
v4l2_frame_params.render_height_minus_1 = frame_hdr->render_height - 1;
for (size_t i = 0; i < std::size(frame_hdr->ref_frame_idx); i++) {
uint8_t idx = frame_hdr->ref_frame_idx[i];
if (idx >= kVp9NumRefFrames) {
VLOGF(1) << "Invalid reference frame index!";
return DecodeStatus::kFail;
}
auto ref_pic = ref_frames.GetFrame(idx);
if (ref_pic) {
auto ref_surface = VP9PictureToV4L2DecodeSurface(ref_pic.get());
// Only partially/indirectly documented in the VP9 spec, but this array
// contains LAST, GOLDEN, and ALT, in that order.
switch (i) {
case 0:
v4l2_frame_params.last_frame_ts = ref_surface->GetReferenceID();
break;
case 1:
v4l2_frame_params.golden_frame_ts = ref_surface->GetReferenceID();
break;
case 2:
v4l2_frame_params.alt_frame_ts = ref_surface->GetReferenceID();
break;
default:
NOTREACHED() << "Invalid reference frame index";
}
}
}
FillV4L2VP9LoopFilterParams(lf_params, &v4l2_frame_params.lf);
FillV4L2VP9QuantizationParams(frame_hdr->quant_params,
&v4l2_frame_params.quant);
FillV4L2VP9SegmentationParams(segm_params, &v4l2_frame_params.seg);
std::vector<struct v4l2_ext_control> ext_ctrls = {
{.id = V4L2_CID_STATELESS_VP9_FRAME,
.size = sizeof(v4l2_frame_params),
.ptr = &v4l2_frame_params},
};
struct v4l2_ctrl_vp9_compressed_hdr v4l2_compressed_hdr_probs;
if (supports_compressed_header_) {
memset(&v4l2_compressed_hdr_probs, 0, sizeof(v4l2_compressed_hdr_probs));
v4l2_compressed_hdr_probs.tx_mode = frame_hdr->compressed_header.tx_mode;
FillV4L2VP9ProbsParams(frame_hdr->frame_context,
&v4l2_compressed_hdr_probs);
ext_ctrls.push_back({.id = V4L2_CID_STATELESS_VP9_COMPRESSED_HDR,
.size = sizeof(v4l2_compressed_hdr_probs),
.ptr = &v4l2_compressed_hdr_probs});
}
const __u32 ext_ctrls_size = base::checked_cast<__u32>(ext_ctrls.size());
struct v4l2_ext_controls ctrls = {.count = ext_ctrls_size,
.controls = ext_ctrls.data()};
scoped_refptr<V4L2DecodeSurface> dec_surface =
VP9PictureToV4L2DecodeSurface(pic.get());
dec_surface->PrepareSetCtrls(&ctrls);
if (device_->Ioctl(VIDIOC_S_EXT_CTRLS, &ctrls) != 0) {
RecordVidiocIoctlErrorUMA(VidiocIoctlRequests::kVidiocSExtCtrls);
VPLOGF(1) << "ioctl() failed: VIDIOC_S_EXT_CTRLS";
return DecodeStatus::kFail;
}
std::vector<scoped_refptr<V4L2DecodeSurface>> ref_surfaces;
for (size_t i = 0; i < kVp9NumRefFrames; i++) {
auto ref_pic = ref_frames.GetFrame(i);
if (ref_pic) {
auto ref_surface = VP9PictureToV4L2DecodeSurface(ref_pic.get());
ref_surfaces.emplace_back(std::move(ref_surface));
}
}
dec_surface->SetReferenceSurfaces(std::move(ref_surfaces));
// Copy the frame data into the V4L2 buffer.
if (!surface_handler_->SubmitSlice(
dec_surface.get(),
dec_surface->secure_handle() ? nullptr : frame_hdr->data.data(),
frame_hdr->data.size())) {
return DecodeStatus::kFail;
}
// Queue the buffers to the kernel driver.
DVLOGF(4) << "Submitting decode for surface: " << dec_surface->ToString();
surface_handler_->DecodeSurface(dec_surface);
return DecodeStatus::kOk;
}
bool V4L2VideoDecoderDelegateVP9::OutputPicture(scoped_refptr<VP9Picture> pic) {
VLOGF(3);
surface_handler_->SurfaceReady(VP9PictureToV4L2DecodeSurface(pic.get()),
pic->bitstream_id(), pic->visible_rect(),
pic->get_colorspace());
return true;
}
bool V4L2VideoDecoderDelegateVP9::NeedsCompressedHeaderParsed() const {
return supports_compressed_header_;
}
} // namespace media